distortion vs torsion

distortion and torsion both are nouns.

Word	Noun	Adjective	Verb	Adverb
distortion	Yes	No	No	No
torsion	Yes	No	No	No

As nouns, torsion is a hyponym of distortion; that is, torsion is a word with a more specific, narrower meaning than distortion:

Other hyponyms of distortion include contortion, crookedness, tortuosity, tortuousness, buckle, warp, gnarl, knot.

distortion (noun)	torsion (noun)
the act of distorting something so it seems to mean something it was not intended to mean	a twisting force
the mistake of misrepresenting the facts	a tortuous and twisted shape or position
a change for the worse
an optical phenomenon resulting from the failure of a lens or mirror to produce a good image
a change (usually undesired) in the waveform of an acoustic or analog electrical signal; the difference between two measurements of a signal (as between the input and output signal)
a shape resulting from distortion